Reduced video bus transfer speed on Sam440ep after update 3
Posted: Wed Jan 04, 2012 9:19 pm
Description:
---------------
Ragemem shows me that the video bus transfer speed between the central RAM and video RAM have been reduced in OS 4.1 update 3/4 compared to update 2.
Is it possible to get the higher video bus speed back?
(I don't know if this is related, but the same executable of DVPlayer uses around 20% more CPU in update 3&4 compared to update 2.).
Thanks in advance for your help.
RageMem shows these numbers (update 3 & 4):
---> VIDEO BUS <---
READ: 39 MB/Sec
WRITE: 53 MB/Sec
..while on update 2 they were:
---> VIDEO BUS <---
READ: 41 MB/Sec
WRITE: 63 MB/Sec
Details of my system:
----------------------------
o ACube SAM440EP 667MHz (mini-ITX) with 512 MB RAM and onboard Radeon M9 gfx chip.
The firmware is upgraded to uboot 1.3.1d + ACubes PCI firmware update for that increases the PCI unit's clock speed (that's how I got 63 MB/sec write speed).
o Acubes setup tool for Sam440ep (increases VIDEO BUS read speed from 14 MB/sec). This is no firmware upgrade; Only software.
o Amiga OS4.1 update 4.
---------------
Ragemem shows me that the video bus transfer speed between the central RAM and video RAM have been reduced in OS 4.1 update 3/4 compared to update 2.
Is it possible to get the higher video bus speed back?
(I don't know if this is related, but the same executable of DVPlayer uses around 20% more CPU in update 3&4 compared to update 2.).
Thanks in advance for your help.
RageMem shows these numbers (update 3 & 4):
---> VIDEO BUS <---
READ: 39 MB/Sec
WRITE: 53 MB/Sec
..while on update 2 they were:
---> VIDEO BUS <---
READ: 41 MB/Sec
WRITE: 63 MB/Sec
Details of my system:
----------------------------
o ACube SAM440EP 667MHz (mini-ITX) with 512 MB RAM and onboard Radeon M9 gfx chip.
The firmware is upgraded to uboot 1.3.1d + ACubes PCI firmware update for that increases the PCI unit's clock speed (that's how I got 63 MB/sec write speed).
o Acubes setup tool for Sam440ep (increases VIDEO BUS read speed from 14 MB/sec). This is no firmware upgrade; Only software.
o Amiga OS4.1 update 4.